Wren Turbines Ltd. MW54 Mk2 & Mk3 Turbo-Jet, kit assembly instructions, Jun 2004
Page 9
balance the rotor satisfactorily due to bearing noise. Repair work for bearing replacement and subsequent balancing is charged at our standard rate as shown
on our price listing.
Spares and servicing.
By purchasing a high cost product like a gas turbine in kit form you are able to make a considerable cost saving over a ready-built and tested version, which
reflects the labour expended and warranty issues. Assembling the engine yourself also equips you to tackle servicing or rectification due to crash damage or
similar incident. To help, spare parts for servicing or repairs on your engine such as bearings, exhaust components, pipe-work, cases etc are all readily available at
modest cost and mostly ex-stock, from Wren Turbines. Please note that this saving also recognises that servicing and any fault finding required for your engine is
your responsibility although Wren Turbines can offer verbal assistance where practicable. It is not possible for Wren staff to perform fault-finding and/or test
running of a kit engine unless agreed in advance, where a charge will be made. Please note that if you decide to incorporate your own modifications or
“improvements” to your engine Wren Turbines cannot assume responsibly if it fails to perform as expected or develops faults that may be attributed to such
changes. Wren Turbines cannot accept responsibility for damage or incorrect operation where it is found that non-genuine Wren Turbines parts have been fitted.
Set-up for testing.
Once you have built up your engine we strongly advise that you do not install it straight into a plane or similar
installation without bench testing and confirming the start sequence and normal mode of operation. For such
testing it is useful to assemble the parts you intend to use in your installation, tank, filter system, pump, ECU etc and
connect them all up on the bench.
The engine can be mounted using a suitable mounting system such as the Wren two part mount and secured firmly
into place. All pipe work must be suitable for kerosene and we recommend “Tygon” type soft tubing for tank feed
to pump and 3mm “Festo” type fittings for the pressure side of the pump to the engine. We suggest you use a good
quality felt filter clunk for your pick-up in the tank. Use 4mm pipe work (solid or flexible) to feed from the tank to
your fuel pump. Do not use any other filters or valves in the
input
side of the pump as we have found they are the
major cause of engine problems with air ingress. It is advised you fit an in-line pressure filter in the line just before
the engine as a “
last chance
” filter. If a fuel shut-off valve is required then install this in the pressure side of the
pump. A version is available from Wren.
Fuel for the engine is clean and filtered Kerosene or Jet A, with a 2.5% (40:1) mix of non-synthetic outboard motor oil to TCW3 spec’, or standard turbine oil such
as Exxon 2380, Aeroshell 500, Mobil JetOil or similar. Starter gas should be propane/butane gas only mix (no dip or slop tube), supplied through an adjustable
control valve and pipe-work able to handle 2Bar (30psi). If you wish to read pressure, then use a “Tee” off the gas line and a gauge reading 2Bar (30psi)
minimum, and pipe-work to match. Please ensure the engine intake is kept well clear of any loose objects. Glow-plug leads, pipe-work, rags, sleeve cuffs and
unfortunately - fingers have all been known to be “hoovered” into the engine so please be especially careful. See the sections at the back of this instruction
booklet for running instructions –
and take care!
Layout of instructions.
The order of assembly for this Mk2 kit as shown in the following pages, is the suggested sequence to follow and has been tested for logical flow and ease of
understanding, we would be pleased to receive your comments on this!
IMPORTANT – do the balancing of the rotor FIRST if you have taken this option, as you need to use the bearings. After this the bearings are
not accessible.
Summary of Contents for MW54 Mk2
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